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<head>
    <meta charset="UTF-8">
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    <title>Document</title>
</head>

<body>
    <div class="main">物流页</div>
    <button onclick="emitAlert()">触发祖先事件</button>
    <script>
        function emitAlert() {
            console.log("!!");
            parent.parent.parentAlert()
        }
    </script>
</body>

</html>